I've had a couple of requests for reduced shadows for the Noux by people wanting to home-build the boat using planking or other methods. Here are the lines with 1-6mm offset from the outer hull surface. A DXF file is attached to the pdf, click the small paper-clip next to the text to save the DXF as a separate file

A building guide for the "Ninja" Marblehead in 4 parts by Henry "Heffe" Ericcson. Published in Pienoismalli in 1988.

During the 80-ies it was still possbile to home-build a competitive Marblehead. The article describes the planking process, radio installation and rig building. An unknown number of these were built and raced in the 1990-ies, the most visible ones being two beautifully planked wooden Ninja's by the Purhonen brothers.

A nice example of how an article series can have a positive effect on the class in a country. A comprehensive guide starting from scratch building the hull and ending with tuning the boat and racing rules/tactics. We definitely need something similar for the IOM class ! (something along these lines is where I want to take the Noux concept - if and when I have time...)

This series later also appeared in the Swedish Allt om Hobby magazine. (If anyone has that article series I could publish it here also!)

Click the upper picture to download the article series (4 Mb)

The lower picture is a link to the plan (1 Mb)

An updated layout plan for the Noux-2 with the winch placed under the foredeck and a circular theme for the hatches.
There's also been a request for a 3D IGES model for the Noux-2 so here it is.

Update 2006 May 03: Hsinli Liu ponted out some problems with the previous IGES file. I have made a new one which should be at better resolution: Noux2_2006may03.IGS

Finally decided to make some proper rudder moulds for the Noux. This design, based on the rudder a number of Noux boats have been using for 1-2 season, was chosen. It's a simple(based on a Marblehead rudder by Bob Sterne actually) moderately deep rudder with a fairly thin section (just enough to accomodate a 4 mm rudder stock).

Below some pictures from the CNC milling of aluminium moulds.


our current homemade machine can make parts to about +/- 0.05 mm which is not that great, but enough for now... (the next cnc project is still on the drawing board)

Finished moulds. Note several pairs of holes because of an um... technical error (operator brain error) which resulted in the first set of holes being misaligned by 3 mm...
These moulds can either be wet-sanded to mirror finish if many rudders will be produced, or for prototype use it is faster to leave them as they are and lightly sand the final rudders.

The new rudders will be tested during the 2006 season.

Draft lines plan for the Noux.

I'm using a feature of Adobe Acrobat 6.0 to attach a DXF version to the PDF file. Open the PDF in acrobat reader and access the DXF by right-clicking on the paper-clip on the right and choose "save embedded file to disk".

drawing in DXF format

Søren Andresen (DEN) sent me the plans for his own design with which he won the 2005 Nordic Championship and placed 2nd in 2004. He also sailed it into 35. place in the 2004 Euro Champs in Arcos/Spain.

The PDF file contains the sections and a drawing with the mast and keel positions but you should really download the DXF file and printout accurate sections with a CAD program if you want to build the boat.

Update 2006 Apr 13: Pietro Binda (ITA) sent me these pictures of his Laerke:

Our bulb moulds are CNC milled from aluminium and more than 15 bulbs have been made successfully from them.

Note that it could be useful to make the hole through which lead is poured in a little larger than shown on the plan.

Update 2004 July: Others experience with this CAD file is that with a cnc milled mould to these dimensions the bulb will come out slightly heavy (2600g) if you use pure lead(density 11.3 kg/dm3) as the material. We have used lighter (ca 10-10.5 kg/dm3) lead which includes other metals to make it slightly stronger.
Many persons have asked more about the bulb moulds and bulb making featured on my picture page so I decided to put the plans here.

Based on the CAD representation on the left we were able to persuade a machinist to CNC mill moulds for us (right) in aluminium.

Update 2005 October: An anonymous reader sent me this pictures of his own CNC effort. The material is at present unkown and it is unkown if it can take the heat from molten lead...

Charles Detriche has kindly allowed me to publish one of his IOM designs. This one is called "Sliver".

Update 2006Dec07: Sliver hull in IGES format

Arrow drawing in DXF format.

Charles Detriche has kindly allowed me to publish one of his IOM designs. This one is called "Arrow".

Update 2006Dec07: Arrow hull in IGES format

Update 2011 March 16: By popular demand, forward and aft 1:1 sections for printing on A4 paper: arrow_fwd_shadows_2011mar16 and arrow_aft_shadows_2011mar16.